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Cognitive functions of gamma-band activity: memory match and utilization

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons84098

Munk,  MHJ
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Herrmann, C., Munk, M., & Engel, A. (2004). Cognitive functions of gamma-band activity: memory match and utilization. Trends in Cognitive Sciences, 8(8), 347-355. doi:10.1016/j.tics.2004.06.006.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-D80B-C
Zusammenfassung
Oscillatory neural activity in the gamma frequency range (>30 Hz) has been shown to accompany a wide variety of cognitive processes. So far, there has been limited success in assigning a unitary basic function to these oscillations, and critics have raised the argument that they could just be an epiphenomenon of neural processing. We propose a new framework that relates gamma oscillations observed in human, as well as in animal, experiments to two underlying processes: the comparison of memory contents with stimulus-related information and the utilization of signals derived from this comparison. This model attempts to explain early gamma-band responses in terms of the match between bottom-up and top-down information. Furthermore, it assumes that late gamma-band activity reflects the readout and utilization of the information resulting from this match.